Starting in Chrome 53, all content is re-rastered when its transform scale changes, if it does not have the
will-change: transform CSS property. In other words,
will-change: transform means "please animate it fast".
Firefox 48 joins Chrome in shipping a native implementation of the Web Animations API.
Better specification compliance and new features coming in Chrome 50.
Resources and more for the Web Animations API
In response to developer feedback, some upcoming features of Web Animations are being renamed.
Learn about Web Animation Playback
Web Animations define a model for supporting animation and synchronization on the Web platform. element.animate() is the first of those pieces landing in Chrome.
An implementation of Web Animations 1.0 has landed in Blink powering CSS Animations and Transitions.